branchStable Class Reference
[Stable sets and cliques]

Branch & bound implementation for stable (independent) node sets. More...

#include <branchStable.h>

Inheritance diagram for branchStable:

Public Member Functions
	branchStable (abstractMixedGraph &) throw ()
	branchStable (branchStable &) throw ()
	~branchStable () throw ()
unsigned long	Size () const throw ()
unsigned long	Allocated () const throw ()
TNode	SelectVariable () throw ()
TBranchDir	DirectionConstructive (TNode i) throw (ERRange)
TBranchDir	DirectionExhaustive (TNode i) throw (ERRange)
branchNode< TNode, TFloat > *	Clone () throw ()
void	Raise (TNode i) throw (ERRange)
void	Lower (TNode i) throw (ERRange)
TFloat	SolveRelaxation () throw ()
void	SaveSolution () throw ()
TObjectSense	ObjectSense () const throw ()
TFloat	Infeasibility () const throw ()
Data Fields
abstractMixedGraph &	G
char *	chi
TNode	currentVar
TNode	selected
THandle	H

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Detailed Description

Branch & bound implementation for stable (independent) node sets.

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Constructor & Destructor Documentation

branchStable (  abstractMixedGraph &   )  throw ()

branchStable (  branchStable &   )  throw ()

~branchStable (   )  throw ()

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Member Function Documentation

unsigned long Allocated (   )  const throw ()

Reimplemented from branchNode< TNode, TFloat >.

branchNode< TNode, TFloat > * Clone (   )  throw () [virtual]

Generate a copy of this branch node. Returns: A pointer to the copy Implements branchNode< TNode, TFloat >.

branchNode< TNode, TFloat >::TBranchDir DirectionConstructive (  TNode  v  )  throw (ERRange) [virtual]

Preferred search direction before feasibility has been achieved. Implements branchNode< TNode, TFloat >.

branchNode< TNode, TFloat >::TBranchDir DirectionExhaustive (  TNode  v  )  throw (ERRange) [virtual]

Preferred search direction after feasibility has been achieved. Implements branchNode< TNode, TFloat >.

TFloat Infeasibility (   )  const throw () [virtual]

Symbolic value for infeasible subproblems. Implements branchNode< TNode, TFloat >.

void Lower (  TNode  i  )  throw (ERRange) [virtual]

Lower an upper variable bound. This operation applies after solving a relaxation and duplicating the branch node. It sets an upper variable bound to the greatest integral lower bound on the current variable value. The operation may restrict further variables, namely, if it is obvoious that no solutions for the master problem are lost. Parameters: i  The index of the restricted variable Implements branchNode< TNode, TFloat >.

branchNode< TNode, TFloat >::TObjectSense ObjectSense (   )  const throw () [virtual]

Decide between maximization and minimization problems. Implements branchNode< TNode, TFloat >.

void Raise (  TNode  i  )  throw (ERRange) [virtual]

Raise a lower variable bound. This operation applies after solving a relaxation and duplicating the branch node. It sets a lower variable bound to the least integral upper bound on the current variable value. The operation may restrict further variables, namely, if it is obvoious that no solutions for the master problem are lost. Parameters: i  The index of the variable to be restricted Implements branchNode< TNode, TFloat >.

void SaveSolution (   )  throw () [virtual]

Copy the current solution to the original problem instance. Implements branchNode< TNode, TFloat >.

TNode SelectVariable (   )  throw () [virtual]

Selection of a variable to be restricted next. Returns: The branch variable index Implements branchNode< TNode, TFloat >.

unsigned long Size (   )  const throw () [virtual]

Implements goblinRootObject.

TFloat SolveRelaxation (   )  throw () [virtual]

Solve the relaxed subproblem according. Returns: The objective value of this relaxed subproblem Implements branchNode< TNode, TFloat >.

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Field Documentation

char* chi

TNode currentVar

abstractMixedGraph& G

THandle H

TNode selected